Struts2.0中Action直接返回字符串

对于Struts2中Action中返回字符串的处理，比如做级联时，就可能用到返回json(字符串)的数据，些时Action该返回字符串,其实：让Action中的返回字符串的方法，直接return null;并在return之前用输出流输出字符串就可以了，跟servlet输入HTMl方法一样。

 

1、

 

public class CscandmsAction extends ActionSupport implements ServletResponseAware{

	Logger log=Logger.getLogger(CscandmsAction.class);
        private HttpServletResponse response;

	public void setServletResponse(HttpServletResponse arg0) {
		this.response=arg0;
		
	}


/**
	 * country dms做级联时返回的JSON数据(字符串)
	 * @param numcountryguid
	 * @return
	 */
	public String getTestJSON() throws Exception{

		response.setCharacterEncoding("utf-8");
		PrintWriter pw=null;
		try {
			pw = response.getWriter();
			pw.write("JSON字符串");
		} catch (IOException e) {
			log.error(e.getMessage(),e.fillInStackTrace());
		}
		//response.setCharacterEncoding("utf-8");
		

		pw.flush();
		pw.close();
		return null;
	}

}